**FILE**US Supreme Court Judge Sandra Day O'Connor,left,is greeted by Britain Prime Minister Margaret Thatcher during a visit in a July 25, 1984 file photo. O'Connor, the first woman appointed to the Supreme ... more

FILE - In this June 9, 1982 file photo, Britain's Prime Minister Margaret Thatcher, right, smiles with satisfaction as President Ronald Reagan makes a farewell speech outside her Downing Street office in London prior to his departure for Bonn. It is not often that the president of the United States needs to seek fashion advice. But when Ronald Reagan was getting ready for a visit to England as a guest of Queen Elizabeth II in June 1982, his people had an important question for the Brits: Just what does one wear to go riding with the queen in the magnificent horse country surrounding Windsor Castle? The answer: Something smart, but casual, of course. Riding boots, breeches and a turtleneck sweater would do fine _ no need for formal riding attire. The fashion inquiry is but one tidbit contained in nearly 500 pages of formerly Confidential documents relating to the Reagan visit being made public Friday, Dec. 28, 2012 by Britains National Archives. (AP Photo/Bob Dear, File) less

FILE - In this June 9, 1982 file photo, Britain's Prime Minister Margaret Thatcher, right, smiles with satisfaction as President Ronald Reagan makes a farewell speech outside her Downing Street office in London ... more

FILE- Former British Prime Minister Margaret Thatcher, gestures to members of the media following her return home from hospital suffering from a broken arm, in central London, in this file photos dated Monday June 29, 2009. 87-year old Thatcher is recuperating at an unnamed hospital, Friday Dec. 21, 2012, after an operation to remove a bladder growth, which was "completely satisfactory", according to adviser Tim Bell, who did not give further details. (AP Photo/Lefteris Pitarakis, File) less

FILE- Former British Prime Minister Margaret Thatcher, gestures to members of the media following her return home from hospital suffering from a broken arm, in central London, in this file photos dated Monday ... more

Summit leaders walk to lunch at Cohen House at Cohen House at Rice University following a morning session. (l-r) President of the European Commission, Jacques Delors; Prime Minister of Italy, Giulio Andreotti; Prime Minister of Japan, Toshiki Kaifu; Prime Mininister of the United Kingdom, Margaret Thatcher; President of France, Francoise Mitterand; Chancellor of West Germany, Helmut Kohl; US President George HW Bush and Prime minister of Canada, Brian Mulroney. July 10, 1990. less

Summit leaders walk to lunch at Cohen House at Cohen House at Rice University following a morning session. (l-r) President of the European Commission, Jacques Delors; Prime Minister of Italy, Giulio Andreotti; ... more

Photo: Nuri Vallbona, Houston Chronicle

Summit leaders walk to lunch at Cohen House at Cohen House at Rice... Photo-3554284.59919 - Houston Chronicle

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FILE This Wednesday, Nov. 28, 1990 file photo shows Margaret Thatcher making a statement to reporters as she leaves No. 10 Downing Street, Westminster on for Buckingham Palace where she will resign as Prime Minister to Queen Elizabeth II. It seems a strange sight: The president of the United States, sometimes called the most powerful person in the world, breaking down in tears thanking campaign workers for their tireless _ and ultimately successful _ work on his behalf. But Barack Obama isn't the only world leader unashamed or unable to avoid being seen crying in public. The enduring image of Margaret Thatcher's departure from office is the tearful face captured by photographers in 1990 as she left the prime minister's official residence at 10 Downing Street for the last time after 11 years as prime minister.(AP Photo/Martin Cleaver) less

FILE This Wednesday, Nov. 28, 1990 file photo shows Margaret Thatcher making a statement to reporters as she leaves No. 10 Downing Street, Westminster on for Buckingham Palace where she will resign as Prime ... more

FILE - Czech President Vaclav Havel, left, talks to former British Prime Minister Margaret Thatcher as they meet at Prague Castle in this Nov. 16, 1999 file photo. Havel, the dissident playwright who wove theater into politics to peacefully bring down communism in Czechoslovakia and become a hero of the epic struggle that ended the Cold War, died Sunday Dec. 18, 2011 in Prague. He was 75. (AP Photo/Stanislav Peska/CTK) less

FILE - Czech President Vaclav Havel, left, talks to former British Prime Minister Margaret Thatcher as they meet at Prague Castle in this Nov. 16, 1999 file photo. Havel, the dissident playwright who wove ... more

Britain's Queen Elizabeth II stands with former prime ministers Tony Blair, from left, Margaret Thatcher, Sir Edward Heath, James Callaghan and John Major in Downing Street, Monday April 29, 2002, before a celebratory royal Golden Jubilee dinner. less

Britain's Queen Elizabeth II stands with former prime ministers Tony Blair, from left, Margaret Thatcher, Sir Edward Heath, James Callaghan and John Major in Downing Street, Monday April 29, 2002, before a ... more

Former British Prime Minister Margaret Thatcher, arrives at a Falklands War commemoration at Horseguards Parade, London, Sunday June 17, 2007. Prime Minister Tony Blair, Prince Charles and Camilla, Duchess of Cornwall, and former British Prime Minister Margaret Thatcher were amongst those who attended to mark the 25th anniversary of the 1982 Falklands conflict. (AP Photo/Ian Jones, Pool) less

Former British Prime Minister Margaret Thatcher, arrives at a Falklands War commemoration at Horseguards Parade, London, Sunday June 17, 2007. Prime Minister Tony Blair, Prince Charles and Camilla, Duchess of ... more

Photo of the participants of the 8th summit of the Western industrialized countries that opened in June 1982 in Versailles. From left to right : president of European Commission Gaston Thorn, Japanese Prime Minister Senko Suzuki, British Prime Minister Margaret Thatcher, US president Ronald Reagan, French president Fran�ois Mitterrand, West-German Chancelor Helmut Schmidt, Canadian Prime Minister Pierre Elliott Trudeau, president of Italian Council Giovanni Spadolini, and Belgian Prime Minister Wilfrid Martens. less

Photo of the participants of the 8th summit of the Western industrialized countries that opened in June 1982 in Versailles. From left to right : president of European Commission Gaston Thorn, Japanese Prime ... more

Photo: AFP, File

Photo of the participants of the 8th summit of the Western... Photo-4438885.59919 - Houston Chronicle

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Future British Prime MInister Margaret Roberts studying a parliamentary reference book with a colleague in 1950 during her period as Britain's youngest parliamentary candidate.

Future British Prime MInister Margaret Roberts studying a parliamentary reference book with a colleague in 1950 during her period as Britain's youngest parliamentary candidate.

Conservative Party leader Margaret Thatcher on the campaign trail during the General Election campaign, Margaret Thatcher, English Conservative politician, who in 1979 became the first woman to be Prime Minister of Great Britain. less

Conservative Party leader Margaret Thatcher on the campaign trail during the General Election campaign, Margaret Thatcher, English Conservative politician, who in 1979 became the first woman to be Prime ... more

Politics, Personalities, pic: November 1959, Conservative M,P, for Finchley Margaret Thatcher, portrait, Margaret Thatcher, (born 1925) English Conservative politician, who in 1979 became the first woman to be Prime Minister of Great Britain (Photo by Popperfoto/Getty Images) less

Politics, Personalities, pic: November 1959, Conservative M,P, for Finchley Margaret Thatcher, portrait, Margaret Thatcher, (born 1925) English Conservative politician, who in 1979 became the first woman to be ... more

Margaret Thatcher, the Conservative Party's youngest candidate for the General Election, Margaret Thatcher, circa 1905, English Conservative Politician, who in 1979 became the first woman to be Prime Minister of Great Britain. less

Margaret Thatcher, the Conservative Party's youngest candidate for the General Election, Margaret Thatcher, circa 1905, English Conservative Politician, who in 1979 became the first woman to be Prime Minister ... more

British Conservative Party candidate for Dartford, Margaret Roberts with voters during a tour of the constituency, 24th January 1950. At 23, Roberts was the youngest ever female candidate to run for the Conservatives. less

British Conservative Party candidate for Dartford, Margaret Roberts with voters during a tour of the constituency, 24th January 1950. At 23, Roberts was the youngest ever female candidate to run for the ... more

British Conservative Party candidate for Dartford, Margaret Roberts (later Margaret Thatcher) with voters during a tour of the constituency, 24th January 1950. At 23, Roberts was the youngest ever female candidate to run for the Conservatives. less

British Conservative Party candidate for Dartford, Margaret Roberts (later Margaret Thatcher) with voters during a tour of the constituency, 24th January 1950. At 23, Roberts was the youngest ever female ... more

British Conservative Party candidate for Dartford, Margaret Roberts (later Margaret Thatcher) with foreman bricklayer John Hayes during a canvassing tour of the constituency, 13th October 1951. The men are working on the Temple Hill Estate. less

British Conservative Party candidate for Dartford, Margaret Roberts (later Margaret Thatcher) with foreman bricklayer John Hayes during a canvassing tour of the constituency, 13th October 1951. The men are ... more